That smile was strangely adorable and that really wasn't helping matters. Or maybe it was. The Doctor was always at his best when he cared and he did care, so damn much. About everyone and perhaps about some just a little bit more. Like John, unstable and crazy as he was, but capable of such bravery, so clever with his schemes. He hugged him for a few seconds before pulling away to start scanning the man, working away on a monitor.

"Of course they didn't kick you out. I bet you are just great at tying knots, aren't you?" There, what better way was there to keep John's mind awake than being just a little flirtatious. He thought he knew him well enough to call that. "I'll have to take some blood, John. You're not scared of needles, are you?"